<div dir="ltr">It is an interesting point because there are logical design tools (e.g. UCD, context diagram) which are used during analysis to plan the requirements of a solution.<div>Then there are physical design tools which are used during design to plan the mechanics of a solution - e.g. IPO, pseudocode.</div>
<div><br></div><div>I'd only ever used DFDs as logical design tools, so it's interesting that Kevork (and Wikipedia) say that DFDs can be used in analysis and design. Further research (e.g. <a href="http://www.ask.com/question/difference-between-logical-and-physical-dfd">http://www.ask.com/question/difference-between-logical-and-physical-dfd</a>) says there are both logical and physical DFDs.</div>
<div><br></div><div>Old dog: one new trick.</div><div><br></div><div>Cheers</div><div>Mark</div><div class="gmail_extra"><br><br><div class="gmail_quote">On 9 October 2013 11:07, Kevork KROZIAN <span dir="ltr"><<a href="mailto:kkrozian@ringwoodsc.vic.edu.au" target="_blank">kkrozian@ringwoodsc.vic.edu.au</a>></span> wrote:<br>
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<p class=""><span style="color:rgb(31,73,125)">Hi Peter,</span></p>
<p class=""><span style="color:rgb(31,73,125)"> </span></p>
<p class=""><span style="color:rgb(31,73,125)">Yes, you make a good point. UCDs are in analysis only. However Context and Data Flow diagrams are found in both analysis and design.</span></p>
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<p class=""><span style="color:rgb(31,73,125)">Kind Regards</span></p>
<p class=""><span style="color:rgb(31,73,125)"> </span></p>
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<p class=""><span style="color:rgb(31,73,125)">Kevork Krozian</span></p>
<p class=""><span style="color:rgb(31,73,125)">IT Pathways Manager</span></p>
<p class=""><span style="color:rgb(31,73,125)">Ringwood Trade Training Facility
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<p class=""><span style="color:rgb(31,73,125)">Tel: 0419 356 034</span><span style="color:rgb(31,73,125)"></span></p>
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<p class=""><span style="color:rgb(31,73,125)"> </span></p>
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<p class=""><b><span lang="EN-US" style="font-size:10pt;font-family:Tahoma,sans-serif">From:</span></b><span lang="EN-US" style="font-size:10pt;font-family:Tahoma,sans-serif"> <a href="mailto:sofdev-bounces@edulists.com.au" target="_blank">sofdev-bounces@edulists.com.au</a> [mailto:<a href="mailto:sofdev-bounces@edulists.com.au" target="_blank">sofdev-bounces@edulists.com.au</a>]
<b>On Behalf Of </b>Langham, Peter P<br>
<b>Sent:</b> Wednesday, 9 October 2013 8:49 AM<br>
<b>To:</b> Year 12 Software Development Teachers' Mailing List<br>
<b>Subject:</b> [Year 12 SofDev] (no subject)</span></p>
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<p><span style="font-family:Calibri,sans-serif">Good morning,
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<p><span style="font-family:Calibri,sans-serif"> </span></p>
<p><span style="font-family:Calibri,sans-serif">First year SD teacher - so my apologies if this has been discussed and resolved in the past.</span></p>
<p><span style="font-family:Calibri,sans-serif"> </span></p>
<p><span style="font-family:Calibri,sans-serif">I've noticed that Context Diagrams, Data Flow Diagrams and Use Case Diagrams are all mentioned in both the Analysis and Design sections of the PSM, page 17 in the study design.
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<p><span style="font-family:Calibri,sans-serif"> </span></p>
<p><span style="font-family:Calibri,sans-serif">Analysis involves:
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<p><span style="font-family:Calibri,sans-serif">• Determining the solution requirements. What information does the solution have to provide? What data is needed to produce the information? What functions does the solution
have to provide? These requirements can be classified as being functional, namely what the solution is required to do, and non-functional, which describes the attributes the solution should possess, such as userfriendliness, reliability, portability, robustness,
maintainability. Tools to assist in determining the solution requirements include
<b><span style="background-color:yellow">context diagrams, data flow diagrams and use cases.</span></b></span></p>
<p><span style="font-family:Calibri,sans-serif"><snip></span></p>
<p><span style="font-family:Calibri,sans-serif">Design involves:</span></p>
<p><span style="font-family:Calibri,sans-serif">• Planning how the solution will function, and the appearance of the resulting information. The solution design typically involves identifying what specific data is required
and how the data will be named, structured, validated and manipulated. Typical design tools for this purpose include data dictionaries and data structure diagrams, input-process-output (IPO) charts, flowcharts, pseudocode, object descriptions. Solution design
also involves, where appropriate, showing how the various components of a solution relate to one another, for example web pages, style sheets, scripts; queries, forms, reports; modules, procedures, functions. Typical design tools used to show relationships
include storyboards, site maps, entity-relationship diagrams, <b><span style="background-color:yellow">data flow diagrams</span></b>, structure charts, hierarchy charts,
<b><span style="background-color:yellow">context diagrams, use cases</span></b>. Planning the solution also involves determining the appearance of information generated from a solution. This typically involves identifying the position of text, images and graphics,
font sizes, colours and text enhancements. Design tools used for this purpose include layout diagrams, annotated diagrams/mocks up.</span></p>
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<p class="">It’s my understanding that context diagrams, data flow diagrams and use cases should only appear in the analysis stage of the PSM.
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<p class="">Is this correct?</p>
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<p class="">Thanks,</p>
<p class=""> </p>
<p class="">Peter Langham</p>
<p class="">Narre Warren South P-12 College</p>
<p><br></p></div></div></blockquote></div><div dir="ltr">--<div>Mark Kelly</div><div>mark AT vceit DOT com</div><div><a href="http://vceit.com" target="_blank">http://vceit.com</a></div><div><br></div><div><span style="color:rgb(0,0,0);font-family:verdana,arial,helvetica,sans-serif;background-color:rgb(253,253,255)"><font size="1">Day 19, I have successfully conditioned my master to smile and write in his book every time I drool.- Pavlov's Dog</font></span><br>
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